This command only fill print buffer,graph begin to print after receiving print
command. After graph printing,buffer will empty.
If the graph length too big,you can split to several graph like 8 length(m = 0、1)or
24 dot(m = 32、33) .
After filling graph data, you can fill other information,print it together.
After filling dot graph,use ESC J(n = 24)and LF to print,but LF will cause feed. You
can set line space=o,and no more feed.
xL, xH, select the number of data bytes (xL+xH×256) in the horizontal direction for
the bit image.
yL, yH, select the number of data bits (yL+yH×256) in the vertical direction for the